Coiler TX series User manual

Broadband Repeater
TX Series
GSM / DCS / PCS / CDMA / WCDMA
User Manual

1
About This Manual
This user’s manual is produced for use of Coiler TX Series by
Coiler personnel, licensees, and customers.
Due to continued progress in methodology, design and
manufacturing the contents of this document are subject to revision
without notice. Coiler assumes no legal responsibility for any error
or damage resulting from the use of this document.
Your comments are welcome – they help us improve our products
and documentation. Please address your comments to Taiwan
Coiler International Corporate headquarters in Taipei, Taiwan, or
call us at [phone].
Edition
1st Edition, June 2006
Copyright
The information contained herein is the property of Coiler. No part
of this document may be reproduced or transmitted in any form or
by any means, electronic or mechanical, for any purpose without
the express written permission of Coiler.
Copyright © 2006
All rights reserved
Trademarks
All trademarks identified by TM or ® are trademarks or registered
trademark of Coiler Corporation. All other trademarks belong to
their respective owners.

2
8F-4, No. 75, Sec. 1, Hsin Tai Wu Road,
Hsi-Chin City (221), Taipei Hsien, Taiwan.
[phone]
[phone]
http://www.coiler.com.tw/
[e-mail]
Coiler
Coiler is a leading supplier of wireless solutions that enable mobile
voice and data communication and wireless Internet access
throughout any facility. The company’s EQ Series provides mobile
users with highly reliable access high quality voice and wireless
data via cellular networks throughout any private (corporation,
university, hospital) or public (airport, convention center, subway)
facility.
Coiler EQ Series supports all global wireless access standards
including GSM900, DCS1800, CDMA and iDEN. Coiler also offers
a full range of professional services to ensure cost effective and
timely deployment of wireless networks.
Your comments can assist us in improving our products and
documentation. Please address them to Taiwan Coiler International
Corp.
Taiwan Coiler International Corp.
Address
Phone
Fax
URL
e-mail

3
Contents
Abbreviations .................................................................. 4
1. Safety ...........................................................................5
2. Introduction .................................................................6
3. Repeater Types............................................................7
4. Installation ................................................................... 8
4.1 Siting the Repeater.........................................................10
4.2 Dimensions and Weights................錯誤! 尚未定義書籤。
4.3 Mounting.........................................................................11
4.4 Connection......................................................................12
5. Commissioning .........................................................13
5.1 Starting the Repeater.....................................................13
5.2 Indicators........................................................................13
5.3 UP/DW Gain Adjustment................................................14
6. Functional Description.............................................15
6.1 Block Diagram................................................................16
6.2 Alarm ...............................................................................17
7. Repeater Application ................................................ 18
7.1 Installation Attention......................................................18
7.2 Installation Procedure....................................................19
7.3 Testing.............................................................................20
7.4 Trouble Shooting............................................................21

4
Meaning
Automatic Gain Control
Base Transceiver Station
Mobile Station
Uplink
Downlink
Global System for Mobile Communications
Code Division Multiple Access
Universal Mobile Telecommunications System
Wideband Code Division Multiple Access
Low Noise Amplifier
Power Amplifier
Power Supply Unit
Radio Frequency
Abbreviation
AGC
BTS
MS
UL
DL
GSM
CDMA
UMTS
W-CDMA
LNA
PA
PSU
RF
Abbreviations

5
1. Safety
Any personnel involved in installation, operation or service of the
Coiler TX Series must understand and obey the following:
1. Coiler TX Series is designed to receive and amplify signals from
one or more base stations and retransmit the signals to one or
more mobile station. Also, the repeater is designed to receive
signals from one or more mobile stations, amplify and retransmit
to the base stations. The repeater must be used exclusively for
these purposes and nothing else.
2. Coiler TX Series supplied from the mains must be connected to
grounded outlets and in conformity with any local regulations.
3. The power supply unit in repeaters supplied from the mains
contains dangerous voltage level, which can cause electric
shock. Switch the mains off prior to any work in such a repeater.
Any local regulations are to be followed when servicing a
repeater. Authorized service personnel only are allowed to
service the repeater while the main is switched on.
4. When working on a repeater on high ground, be careful not to
drop parts or the entire repeater. Falling parts can cause serious
personal injury.
5. Any repeater, including this repeater, will generate radio signals
and thereby give rise to electromagnetic fields that may be
hazardous to the health of any person who is extensively
exposed to the signals at the immediate proximity of the
repeater and the repeater antennas.

6
2. Introduction
Coiler TX Series is a very useful equipment that can provide highly
reliable, high quality mobile communications in cellular network.
Especially, it is used to fill out uncovered areas in cellular mobile
system, such as base station fringe areas, business and industrial
buildings, etc.
This one-person-one-phone capability gives user the ability to use
their cellular phone in any location throughout the enterprise and
beyond. Seamless coverage lets phone users roam freely between
buildings as well as indoors and outdoors without changing phones.
A repeater receives signals from a base station, amplifies and
retransmits the signals to mobile stations. Also it receives, amplifies
and retransmits signals in the opposite direction. Both directions
are served simultaneously.
To be able to receive and transmit signals in both directions, the
repeater is connected to a donor antenna directed towards the
base station and to a service antenna directed towards the area
Donor
Antenna
TX Series
(Service Antenna Embedded)
Jumper
Cable

7
needs to be covered.
3. Repeater Types
Coiler TX Series has the following series:
zGSM 900
zDCS 1800
zPCS 1900
zCDMA 800
zUMTS 2200 (W-CDMA)
The Coiler TX Repeater System is designed to improve cell phone
signal coverage and enhance reception in the indoor areas where
mobile signal is limited or compromised due to construction
structures or natural obstacles.
The TX Repeater System has been optimized to provide cellular
signal coverage and improve voice quality and service range in
areas up to 250 square meters of empty space. It is perfect for the
installation in homes, offices, conference rooms and shops.
Coiler TX Repeater System with Panel Antenna is designed for use
in areas where adequate mobile signal is available on the roof or
side of the building.

8
4. Installation
Before installation, please read Chapter 1 'Safety' closely.
Check the package contents to make sure everything is included
inside. Please contact the dealer if any part is missing.

9
4.1 Repeater Parts Identification
The detailed information about each part of the TX Series is as the
figure below.
The Specification of the AC Adapter:
INPUT: 100~240VAC, 0.5A, 50~60Hz
OUTPUT: 8VDC, 2A
To prevent the device from damage, please make sure that the
power supply available in the installation location meets the
specification above.

10
4.2 Sitting the Repeater
Coiler TX Series is designed for indoor usage only. However,
humidity and temperature changes may have some affect on
reliability. A preferable site for the repeater is in a tempered and
ventilated room.
For the best performance the repeater should be installed on the
wall at least 2 meters from the floor and make sure that AC power
plug is available near to the repeater unit. The repeater should be
ideally placed centrally to the area requiring coverage.
Make sure that the distance between the repeater unit and the
donor antenna is at least 5 meters. Remember that the length of
the cable is 10 meters, so make sure you have reserved enough
cable to connect the donor antenna and the repeater unit.
Use mounting kit to fasten the main unit bracket first. Place the
main unit on the bracket.

11
4.3 Donor Antenna Mounting
Please refer to the figure below. It is easy to mount the donor
antenna using the provided mounting accessories shown below.
The donor antenna should be mounted on the roof of the house
where the signal power level is well.
The antenna may be mounted on an existing TV antenna pole or a
wall. You may need to reposition or rotate the donor antenna to find
the direction providing the strongest signal strength.
To achieve the best performance, we suggest a donor installation
position with the signal power level. Ideally the donor antenna
should face the nearest Base Station.
A perfect location should have outdoor signal strength greater than
-80 dBm (full signal bar on a mobile phone).

12
4.4 Connection
SMA female connectors are used in the repeater. There is no need
to install the service antenna (MS) which has been embedded
inside the repeater unit.
1. Route the cable between the donor antenna and the repeater
unit. Connect the cable to the connector marked SMA on the
repeater.
2. Connect the other end to the donor antenna. Make sure that all
the connections are tightly fastened.
3. Connect the power cord to the repeater where marked as 'DC in'.
4. DO NOT connect the AC Adapter to a power source (such as
wall socket) for now.
Cable
Donor
Antenna
Cable Repeater

13
5. Commissioning
Read carefully Chapter 1 Safety before commissioning the
repeater.
Check all connectors are connected correctly during the installation.
Also, ensure that AC Adapter is connected to a power source such
as a wall socket.
When the installation is checked, commission the repeater as
described below.
5.1 Starting the Repeater
1. Connect the power cable of the adaptor to the main unit where
marked DC 8V and plug the adaptor into the power plug.
2. The power indicator LED should be green and the LED displays
will initially show the model number and after 2 seconds it will
display the current uplink and downlink gain of the repeater.
3. Default gain of the repeater is set for maximum values. In case of
restarting the units, gain will be set for the last configured value.
4. Make sure that no other LED is illuminated. If any other LED is lit,
see Troubleshooting.
5. The TX Repeater System is now ready to work.

14
5.3 UL/DL Gain Adjustment
In order to meet environment requirement, Coiler TX Series
provides UP/DW switch individually to control Uplink/Downlink gain.
The UP/DW gain control range is from 40 to 50 dB by 1dB step.
You can adjust the uplink (UL) and downlink (DL) gain by pushing
the correspondent button (please use a needle).
f. DL gain adjustment buttons
g. UL gain adjustment buttons
(Please refer to the 4.1)

15
6. Functional Description
Coiler TX Series works as bi-directional amplifiers. A repeater
receives, amplifies, and retransmits signals downlink and uplink
simultaneously, i.e. from the base station via the repeater to the
mobile stations and from the mobile stations via the repeater to the
base station.
The repeater is connected to a donor antenna, directed towards the
base station, and to a service antenna directed towards the area to
be covered. The service antenna is connected directly to the
repeater with the SMB female connector inside the housing. So it is
convenient for user to install given this delicate design.
UL/DL Alarm LED, Power LED, and 7-segment displays of UL/DL
gain are visible on the repeater front:
Power – If it shows green light, it means the DC power is working normally.
UL PW – If it shows red light, it means the UL saturation.
DL PW – If it shows red light, it means the DL saturation.
UL gain display – It shows the current uplink gain.
DL gain display – It shows the current downlink gain.
a. Power LED
b. DL alarm LED
c. UL alarm LED
d. DL gain value
e. UL gain value
(Please refer to the 4.1)

16
6.1 Block Diagram
Figure above shows a block diagram of Coiler TX Series. The
diagram is applicable to repeaters for the GSM900, DCS1800,
PCS1900, CDMA800 and UMTS2200.
For Downlink path
The signal from the base station is received via the repeater BTS
antenna. The signal passes a duplex filter, is amplified in a low
noise amplifier (LNA), then passes to the DW attenuator. The
downlink signal will be shaped by Downlink Converter, after that is
amplified in a power amplifier (PA).
LNA PA
Downlink
Converter
ATT
PA LNA
ATT
Duplex Duplex
Uplink
Converter
BTS MS
Downlink
Uplink
Block Diagram of TX Series

17
For Uplink path
The signal from the mobile station is received via the repeater MS
antenna. The signal passes a duplex filter, is amplified in a low
noise amplifier (LNA), then passes to the UP attenuator. The uplink
signal will be shaped by Uplink Converter, after that is amplified in a
power amplifier (PA).
6.2 Alarm
Coiler TX Series provides LED to distinguish the repeater is
working fine or not.
UL/DL Alarm LED:
ULAlarm LED – If it shows red light, it means the UL saturation.
This may happen when the isolation of the donor antenna and the
service antenna embedded in the repeater is insufficient.
DLAlarm LED – If it shows red light, it means the DL saturation.
This may happen when the user is making a call beside the service
antenna embedded in the repeater.
For the solution to the alarms above, please see ‘Trouble Shooting’.

18
7. Repeater Application
7.1 Installation Attention
1. Choosing GSM900 Repeater needs to go with the accessories in
GSM900 band. In the same way, choosing DCS1800 Repeater
needs to go with the accessories in DCS1800 band.
2. The signal strength from donor antenna directly affects the
indoor coverage of the repeater. It is important to choose the
location to install the donor antenna.
3. In order to avoid oscillation in repeater, we need an isolation
which is the repeater gain plus 15dB. For example, if the
repeater gain is 50dB, then we need 65dB isolation between
donor antenna and service antenna.
4. For the best performance, signal level of the donor antenna
should be greater than -80dBm, and less than +10dBm.
5. Calculating the link budget before installing the repeater. Use the
outdoor signal, donor antenna gain, coaxial cable loss, service
antenna gain and coverage area to decide the best gain that the
repeater should be adjusted.

19
7.2 Installation Procedure
Site Survey
Installation Planning
Link Budge Calculating
Install DonorAntenna
Cable installation
Install Repeater
Signal Measurement
Gain Adjusting
Testing
Trouble Shooting